I am looking for a SWT Combo where only dropdown arrow is shown in order to save space.
I found that setting a GridData.widthHint to the width of the arrow icon on the Combo might do the trick.
The question is how do I ask the Combo layout the exact width of the down arrow on the Combo so that I can set that as the widthHint?
Update:
Looks like even setting the widthHint = 0 still shows part of the text field. So any other ideas would be welcome.
I don't see a way to get the drop down button width. Messing around with the width hint is likely to be very platform dependent.
An alternative would be to use code similar to the CCombo control but without the Text field. This uses a Button with the SWT.ARROW | SWT.DOWN style:
Button button = new Button(parent, SWT.ARROW | SWT.DOWN);
When the button is pressed an SWT List control is displayed.
Related
I have 2 buttons. say for example a "Browse" button and a "Start Data Backup" Button. I have applied a common style to these buttons. find the buttons below.
As you can see, the content of the browse button aligned properly to the center. But the another one doesn't have any borders. it occupied the button completely. I know it is due to the length of the text and we can fix it by setting the width of the button, but unfortunately i cannot set my button width .because i need my button should give same look with different screen resolution.
What i need now is, the content should be aligned as like in browse button regardless of content length. How to achieve this?
If you have limitation on changing the width of Button for different screen resolutions, instead of changing the width of button try overwriting the font size of the content in button. Also make use of content wrapping to get extra text in new line.
How do I set the color of the radio button's control? No matter what color I specify in the style, it draws the outer circle and inner bullet in black. I want it to draw in in white on a black background to match my theme, but it always draws in black. (I'm actually doing this in a Multi-Button, setting the color of the Emblem UIID.)
I tried the first suggestion, to define the constants. That didn't work. Here's what happened.
I tried it two ways. First I defined just the radioSelectedImage and radioUnselectedImage. When that didn't work, I added both the radio*DisImage values, but it did the same thing. The selected and unselected images worked fine, but as soon as I touched a radio button, it got the focus, and the button was drawn in black, which made it invisible against my black background.
I did find an approach that worked, but it required the use of two deprecated classes. Here's what I added to the init() method of my main class:
LookAndFeel lookAndFeel = UIManager.getInstance().getLookAndFeel();
if (lookAndFeel instanceof DefaultLookAndFeel) {
DefaultLookAndFeel defaultLookAndFeel = (DefaultLookAndFeel) lookAndFeel;
Image sel = theme.getImage("RadioButtonSelected.png");
Image unSel = theme.getImage("RadioButtonUnselected.png");
defaultLookAndFeel.setRadioButtonImages(sel, unSel, sel, unSel);
defaultLookAndFeel.setRadioButtonFocusImages(sel, unSel, sel, unSel);
}
The difference here is that I have a way to set the focus images. I can't do that using the constants, which is probably why it doesn't work. I'd really rather not use deprecated classes.
There are theme constants to allow you to add images to the radio button for unselected, selected, etc. Look here...
https://www.codenameone.com/manual/advanced-theming.html
Please, see picture bolow:
I cannot get rid of white paddings/margins in combobox popup. I have two custom containers in designer called DropdownItem and DropdownItemSelected, Fisheye renderer type for ComboBox renderer. As you may see in combobox selected item is displayed just fine. However, in I cannot get combobox popup displayed without white paddings. I have actually used PopupContentPane to add blue border around popup, I also have border set to empty, all margins/paddings set to 0 for following UIIDs: PopupItem, PopupFocus, DropdownItem and DropdownItemSelected. PopupContentPane has also all paddings/margins set to 0. Also see my contants:
I went through source code and cannot find any other useful UIID I can style in order to remove these white paddings. Can someone help me with this?
Update:
Might be helpful - see below how popup looks like when PopupContentPane border sickness is set to 2px:
Update 2:
Almost there. After setting listItemGapInt constant to 0 I managed to remove gaps between list items. See screenshot below.
I still cannot find out how to remove 2 pixel gap on the right and don't know where it's coming from. Would appreciate any thoughts/ideas.
Update 3:
I eventually found where two pixels are coming from.
com.codename1.ui.ComboBox class, lines 289-290
289 int listW = Math.max(getWidth() , l.getPreferredW());
290 listW = Math.min(listW + getUIManager().getLookAndFeel().getVerticalScrollWidth(),
parentForm.getContentPane().getWidth());
In my particular case, listW=630px and in line 290 listW is recalculated as Math.min(630 + 2, 768), where 2px is width of vertical scroll.
As far as can say, scroll bar should be a part ComboBox popup.
I managed to remove unwanted gaps. As I mentioned in 'update 2', listItemGapInt should be set to 0 in order to remove horizontal gaps.
Vertical gap was related to scroll bar however it was not clear that it's a vertical scroll bar that creates that gap. After I set paddings to 0 for Scroll UIID, vertical gap has gone.
In regard to update 3, this is a bug but not because it should be in the container. The list is scrollable so this should be a part of the list however the call should be to l.getSideGap() and not to getVerticalScrollWidth().
This will allow you to hide that by setting the scroll bars to visible false etc. We'll fix that for the next update.
This Radmenu is dynamically created in code behind.Please let me know how to add scroll bar in this menu to limit the items in the submenu.
Check out this post from telerik forums.
Though it's in silverlight, I'm pretty sure you can use it as is.
Try explicitly setting the Height property of the Menu for that has a lot of menu items and that should add (Up/Down) button I believe
While not a scrollbar, you can set the DropDownHeight property of the RadMenuItem. It limits the height taken by the child menu items, and has up/down arrows to enable the scrolling.
I am currently working in the C# windows application with DevExpress controls.
Now I want to change back color of bar button item while loading the form.
I've tried following code:
barButton.Appearance.BackColor = Color.Red;
but the bar button back color not changed to red.
By default, bars use the skins to draw their content. In this case, all background colors are provided by specific skin elements, which cannot be changed. The only way to change a specific item's background color is to disable skins:
put the BarAndDockingController component onto a form, and assign it to the BarManager.Controller property. Set BarAndDockingController.PaintStyleName or LookAndFeel to any non-skin style(for example "Flat"). Then use the Bar.Appearance.BackColor property to set the desired color.
Alternatively, you can create your own custom barItem in a way similar to the one described in the How to change the background color of highlighted links KB article.